MFKilla

Hmm..cbr600 has 4*38mm is like one 76mm. On honda acord type R stand 64mm trottle body and give 220hp.
Why i lose power?

2junkyard racer: i have a tuned ecu. i have mugen bin on BRE.I have a lighty light flywheel made on stock.
But need more power. Needed ~180-190hp.

J-SMITH69

one 3" pipe will flow more air than two 2.5"

jinxy

each throttle plate on the 38mm's take up 4534.16 millimeters

the 64mm throttle body's area is 3215.36 square millimeters

jinxy

oh yeah? you have a tottal area of 7 square inches on the 3 inch pipe and 9.81 on the 2x2.5 inch pipes. I dont see how the 3 inch pipe could flow more, unless you're just being sarcastic.

J-SMITH69

i was being serious

Guy-Fast

I love your math



Now it doesnt work that ya


Under your thought process you could run 4 15mm tb's which wouldnt turn a hamster wheel which would equal a 60mm tb



classic


take a micrometer to your head ports on the b16a and tell me the port size and try again

SkunT

did you get that chip from ebay for $7? thats a beast there.

Good luck on the build

Guy-Fast

bre is a a real editor that works and if its the real mugen bin it runs basic b16s pretty solid.

SkunT

the real mugen tune is pretty weak honestly Chris. Unless your going to be 6k rpms on -> for long durations (N1)
There are many better options IMO.

Reddy

Learn something about fluid flow dynamics, there's more to flow than just total internal area. One big pipe can outflow 2 medium sized pipes becuase of the difference in surface tension